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Daikin FFQ09Q2VJUFFQ12Q2VJUFFQ15Q2VJUFFQ18Q2VJURX09QMVJURX12QMVJURX15QMVJURX18QMVJU, Service Manual

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Daikin FFQ09Q2VJUFFQ12Q2VJUFFQ15Q2VJUFFQ18Q2VJURX09QMVJURX12QMVJURX15QMVJURX18QMVJU Service Manual Download Page 87

SiUS091628EA

Troubleshooting

Service Diagnosis

76

4.12 Signal Transmission Error (Between Indoor Unit and 

Outdoor Unit)

Error Code

U4

Method of Error 
Detection

The signal transmission data from the outdoor unit is checked whether it is normal.

Error Decision 
Conditions

The data sent from the outdoor unit cannot be received normally, or the content of the data is 
abnormal.

Supposed 
Causes

„

Power supply voltage out of specification

„

Reduction of power supply voltage

„

Wiring error

„

Breaking of the connecting wires between the indoor and outdoor units (wire No. 3)

„

Defective outdoor unit PCB

„

Short circuit inside the fan motor winding

„

Defective indoor unit PCB

„

Disturbed power supply waveform

Summary of Contents for FFQ09Q2VJUFFQ12Q2VJUFFQ15Q2VJUFFQ18Q2VJURX09QMVJURX12QMVJURX15QMVJURX18QMVJU

Page 1: ...Service Manual Inverter Pair Ceiling Mounted Cassette Type FFQ Q Series SiUS091628EA Applied Models z Inverter Pair Heat Pump...

Page 2: ...91628EA i Table of Contents Inverter Pair Ceiling Mounted Cassette Type FFQ Q Series zHeat Pump Indoor Unit FFQ09Q2VJU FFQ12Q2VJU FFQ15Q2VJU FFQ18Q2VJU Outdoor Unit RX09QMVJU RX12QMVJU RX15QMVJU RX18Q...

Page 3: ...MVJU 11 Part 4 Functions and Control 12 1 Main Functions 13 1 1 Temperature Control 13 1 2 Frequency Principle 13 1 3 Airflow Direction Control 15 1 4 Fan Speed Control for Indoor Unit 15 1 5 Program...

Page 4: ...r Unit PCB Abnormality 64 4 3 Drain Level Control System Abnormality 65 4 4 Indoor Fan Motor DC Motor or Related Abnormality 66 4 5 Humidifier or Related Abnormality 68 4 6 Thermistor or Related Abnor...

Page 5: ...8 Rotation Pulse Check on the Outdoor Unit PCB 106 5 9 Installation Condition Check 107 5 10 Discharge Pressure Check 107 5 11 Outdoor Fan System Check 108 5 12 Main Circuit Short Check 108 5 13 Power...

Page 6: ...rding Safety of Workers Warning Do not store equipment in a room with fire sources e g naked flames gas appliances electric heaters Be sure to disconnect the power cable from the socket before disasse...

Page 7: ...equipment failure Do not mix air or gas other than the specified refrigerant R 32 R 410A R 22 in the refrigerant system If air enters the refrigerant system an excessively high pressure results causi...

Page 8: ...able and lead wires are scratched or have deteriorated be sure to replace them Damaged cable and wires may cause an electrical shock excessive heat generation or fire Do not use a joined power cable o...

Page 9: ...ake sure that there is no leak If the leaking point cannot be located and the repair work must be stopped be sure to pump down and close the service valve to prevent refrigerant gas from leaking into...

Page 10: ...generation fire or an electrical shock If the installation platform or frame has corroded replace it A corroded installation platform or frame may cause the unit to fall resulting in injury Check the...

Page 11: ...ion is used when there is danger that the reader through incorrect manipulation may damage equipment lose data get an unexpected result or have to restart part of a procedure Note Note A Note provides...

Page 12: ...SiUS091628EA 1 List of Functions Part 1 List of Functions 1 Functions 2...

Page 13: ...control z 1 Self diagnosis R C LED z z 3 D airflow Wiring error check function COMFORT AIRFLOW operation Anti corrosion treatment of outdoor heat exchanger Comfort Control Auto fan speed z 1 z 1 Indo...

Page 14: ...SiUS091628EA 3 Specifications Part 2 Specifications 1 Specifications 4...

Page 15: ...7 6 282 8 0 268 7 6 282 8 0 Fan Type Turbo Fan Turbo Fan Speed Steps 3 Steps 3 Steps Running Current Rated A 0 23 0 21 0 23 0 21 0 27 0 24 0 27 0 24 Power Consumption Rated W 23 23 27 27 Power Factor...

Page 16: ...Fan Type Turbo Fan Turbo Fan Speed Steps 3 Steps 3 Steps Running Current Rated A 0 29 0 26 0 29 0 26 0 52 0 47 0 52 0 47 Power Consumption Rated W 28 28 51 51 51 51 Power Factor Rated 46 4 46 8 46 4 4...

Page 17: ...Part 3 Printed Circuit Board Connector Wiring Diagram 1 Indoor Unit 7 1 1 FFQ09 12 15 18Q2VJU 7 2 Wired Remote Controller 8 2 1 BRC1E73 8 3 Wireless Remote Controller Kit 9 3 1 BRC082A41W BRC082A42W...

Page 18: ...6 X25A Connector for drain pump motor 7 X27A Connector for terminal block for inter unit wiring 8 X30A Connector for terminal block for wired remote controller 9 X33A Connector for adaptor for wiring...

Page 19: ...emote Controller Printed Circuit Board Connector Wiring Diagram 8 2 Wired Remote Controller 2 1 BRC1E73 Wired Remote Controller PCB 1 P1 P2 Terminal for indoor unit 2 R4T Room temperature thermistor P...

Page 20: ...2 X2A Connector for control PCB A1P 3 SS1 MAIN SUB setting switch Refer to page 123 for details 4 SS2 Address setting switch Refer to page 123 for details 3P156326 3 X2A SS2 SS1 X1A 1 X1A Connector fo...

Page 21: ...Connector for overload protector 4 S71 Connector for DC fan motor 5 S80 Connector for four way valve coil 6 S90 Connector for thermistors outdoor temperature outdoor heat exchanger discharge pipe 7 HL...

Page 22: ...load protector 3 S70 Connector for DC fan motor 4 S80 Connector for four way valve coil 5 S90 Connector for thermistors outdoor temperature outdoor heat exchanger discharge pipe 6 HL1 HN1 S Connector...

Page 23: ...on With Wired Remote Controller BRC1E73 23 1 9 Drain Pump Control 23 1 10 Hot Start Control In Heating Operation Only 25 1 11 Presence and Floor Sensors Option 26 1 12 Other Functions 29 2 Control Spe...

Page 24: ...by the following 2 parameters The load condition of the operating indoor unit The difference between the room thermistor temperature and the target temperature The target frequency is adapted by addit...

Page 25: ...ng Once the set temperature is reached the energy saving operation enables to maintain the room temperature at low power Frequency Limits The following functions regulate the minimum and maximum frequ...

Page 26: ...the airflow discharging horizontally Individual Flap Control With decoration panels BYFQ60C2W1W S and wired remote controller BRC1E73 you can control each one of the four flaps individually The follo...

Page 27: ...ature is divided into two zones Then the unit operates in an appropriate capacity for each zone to maintain the temperature and humidity at a comfortable level Room thermistor temperature at start up...

Page 28: ...wn the button causes the number to change continuously Press buttons to select Clock Calendar on the main menu screen Press Menu OK button to display the clock calendar screen Select Month with button...

Page 29: ...e the minute with buttons Holding down the button causes the number to change continuously Press Menu OK button The confirmation screen will appear The date can be set between January 1 2015 and Decem...

Page 30: ...od __ Indicates that the temperature setpoint and setback temperature setpoint for this time period is not specified The last active setpoint will be utilized Refer to Setback function on page 23 for...

Page 31: ...3 Press buttons to select Yes on the confirmation screen Pressing Menu OK button enters the daily patterns in the schedule and takes you back to the main menu screen R24074 1 The schedule screen will...

Page 32: ...ure setpoint and setback temperature setpoint for this time period is not specified The last active setpoint will be utilized Indicates that the setback function is disabled for this time period 5 A m...

Page 33: ...ss Menu OK button to display the enable disable screen Press buttons to select Enable or Disable on the enable disable screen Press Menu OK button after selecting the item The confirmation screen is d...

Page 34: ...nabled the Setback mode becomes active when the indoor unit is turned off by either the user a schedule event or an off timer Setback function is not available by default It can be enabled by the syst...

Page 35: ...n turns ON again after 5 seconds 4 After A3 is determined and the unit comes to an abnormal stop the thermostat will remain OFF even if the float switch turns ON again 1 9 3 If the Float Switch is OFF...

Page 36: ...At startup with thermostat ON or after the completion of defrosting in heating operation the indoor unit fan is controlled to prevent cold air from blasting out and ensure startup capacity Details R2...

Page 37: ...tion panel BYFQ60C2W1W S sensor kit BRYQ60A2W S and wired remote controller BRC1E73 are connected to the main unit and draft prevention is set to enabled on the wired remote controller Factory setting...

Page 38: ...controller Factory setting is disabled Setting on the remote controller 2 3 4 5 1 Press buttons to select Auto setback by Sensor Press Menu OK button to display Auto setback by Sensor menu Press butto...

Page 39: ...ir temperature but floor temperature This function is enabled when decoration panel BYFQ60C2WAW S and sensor kit BRYQ60A2W S is connected to the main unit 2 3 4 1 Press buttons to select Auto off by S...

Page 40: ...ply is restored to the conditions prior to the power failure Note It takes 3 minutes to restart the operation because the 3 minute standby function is activated 1 12 3 Emergency Operation Switch With...

Page 41: ...installation and servicing Details Heat Pump Model Note Unless specified otherwise dry operation command is regarded as cooling operation Air conditioner control mode Forced operation mode Forced coo...

Page 42: ...cut freeze up protection defrost control 3 Determine lower limit frequency The maximum value is set as an lower limit frequency among the frequency lower limits of the following functions Four way va...

Page 43: ...Frequency control is carried out only when the frequency drops For limiting lower limit Frequency control is carried out only when the frequency rises 4 Upper and lower limit of frequency by PI contro...

Page 44: ...emperature 85 C 185 F OFF condition Discharge pipe temperature 2 C 35 6 F Radiation fin temperature 90 C 194 F Control B ON condition Discharge pipe temperature 10 C 50 0 F Radiation fin temperature 8...

Page 45: ...The lower limit of frequency keeps A Hz for B seconds with any conditions 1 through 4 above When the outdoor temperature is above C in heating the frequency decreases depending on the outdoor tempera...

Page 46: ...further Details 09 12 class 15 18 class C F C F A 110 230 0 110 230 0 B 103 217 4 103 217 4 C 98 208 4 101 5 214 7 D 93 199 4 100 212 0 E 88 190 4 95 203 0 Zone Control Stop zone When the temperature...

Page 47: ...e compressor is stopped Dropping zone The upper limit of the compressor frequency is defined as operation frequency 2 Hz After this the output frequency is lowered by 2 Hz every second until it reache...

Page 48: ...s judged with the indoor heat exchanger temperature R24371 Reset zone Indoor heat exchanger temperature R2T Up zone Keep zone Dropping zone Stop zone 13 C 55 4 F 7 C 44 6 F 5 C 41 0 F 3 C 37 4 F 0 C 3...

Page 49: ...w the rotation speed of the outdoor fan is reduced When the pressure difference is high the rotation speed of the outdoor fan is controlled as well as normal operation 5 Fan speed control during force...

Page 50: ...n the duration of the previous defrost control of accumulated time have passed since the start of the operation or ending the previous defrosting Conditions for Canceling Defrost The judgment is made...

Page 51: ...discharge pipe thermistor is disconnected Feedback Control Target discharge pipe temperature control Details The following are the examples of electronic expansion valve control which function in each...

Page 52: ...harge pipe temperature exceeds a certain value the electronic expansion valve opens and the refrigerant runs to the low pressure side This procedure lowers the discharge pipe temperature 2 11 7 Discha...

Page 53: ...ectronic expansion valve opening is adjusted so that the actual discharge pipe temperature becomes close to the target discharge pipe temperature Indirect SH superheating control using the discharge p...

Page 54: ...r 4 Outdoor temperature thermistor 2 12 2 Detection of Overcurrent and Overload Outline An excessive output current is detected and the OL temperature is observed to protect the compressor Details If...

Page 55: ...SiUS091628EA Remote Controller 44 Part 5 Remote Controller 1 Wired Remote Controller BRC1E73 45 2 Wireless Remote Controller Kit BRC082A41W BRC082A42W S 51...

Page 56: ...te Controller 1 Wired Remote Controller BRC1E73 3 Menu OK button 8 On Off button 10 Cancel button 9 Operation lamp 11 LCD with backlight 4 Up button 5 Down button 6 Right button 7 Left button 1 Operat...

Page 57: ...light will be illuminated for approximately 30 seconds by pressing any button If two remote controllers are used to control a single indoor unit only the controller accessed first will have backlight...

Page 58: ...ault Detailed and Simple displays can be selected in the main menu 10 Changeover controlled by the master indoor unit 9 Under centralized control 4 Stand by for Defrost Hot start The airflow direction...

Page 59: ...mple 2 Fan speed 3 Setpoint 1 Operation mode 11 Setback 14 Selectable Display Item 4 Stand by for Defrost Hot start Depending on the field settings while the indoor unit is stopped OFF may be displaye...

Page 60: ...is limited Displayed when another indoor unit on the system has the authority to change the operation mode between cool and heat Displayed when an energy recovery ventilator is connected Ventilation M...

Page 61: ...unit model does not include oscillating louvers this item will not be displayed Displayed if the clock is set If the clock is not set will be displayed 12 hour time format is displayed by default Sel...

Page 62: ...Wireless Remote Controller Kit BRC082A41W BRC082A42W S SiUS091628EA 51 Remote Controller 2 Wireless Remote Controller Kit BRC082A41W BRC082A42W S R23936 R23937...

Page 63: ...tem will stop Press this button to select the fan speed LOW MEDIUM or HIGH of your choice Use this button for setting temperature 11 TIMER MODE START STOP BUTTON 12 TIMER RESERVE CANCEL BUTTON 13 AIRF...

Page 64: ...t and Remote Controller 72 4 10 Signal Transmission Error Between MAIN Remote Controller and SUB Remote Controller 73 4 11 Low voltage Detection or Over voltage Detection 74 4 12 Signal Transmission E...

Page 65: ...ctronic Expansion Valve Check 102 5 5 Four Way Valve Performance Check 103 5 6 Inverter Unit Refrigerant System Check 103 5 7 Inverter Analyzer Check 104 5 8 Rotation Pulse Check on the Outdoor Unit P...

Page 66: ...lure of 2 to 10 cycles stops air conditioner operation Operation lamp OFF Check the outdoor temperature Heating cooling operations are not available when the outdoor temperature is out of the operatio...

Page 67: ...tic procedure described in the following pages With wired remote controller BRC1E73 With wireless remote controller kit BRC082A41W BRC082A42W S In case of wireless remote controller a transmitter boar...

Page 68: ...nheit 1 3 Main Menu Airflow Direction Individual Airflow Direction Ventilation Schedule Off Timer Celsius Fahrenheit Filter Auto Clean Maintenance Information Configuration Current Settings Clock Cale...

Page 69: ...n Operation lamp 2 Error Code A1 Contact Info 0123 456 7890 Indoor Model 000 Outdoor Model 000 If an error occurs either one of the following items will flash in the basic screen The Operation lamp wi...

Page 70: ...ade z Filter cleaning sign time z Others Following codes can be checked z Error codes z Indoor model code Service data can be obtained z Error code history z Temperature data of various sections Servi...

Page 71: ...he left 0 upper digit indication of the error code blinks Step Action UP button DOWN button R15408 If you hear Then 3 short beeps Follow all steps below 1 short beep Follow steps 3 and 4 Continue the...

Page 72: ...Press OPERATION MODE SELECTOR button The right 0 lower digit indication of the error code blinks Step Action UP button DOWN button R15411 UP DOWN 4 5 6 7 8 9 U P L J F H E C A 0 If you hear Then 2 sho...

Page 73: ...ION MODE SELECTOR button to return to the normal mode If you do not press any button for 1 minute the remote controller automatically returns to the normal mode Step Action UP button DOWN button R1541...

Page 74: ...Remote controller thermistor abnormality 71 U5 Signal transmission error between indoor unit and remote controller 72 U8 Signal transmission error between MAIN remote controller and SUB remote control...

Page 75: ...mputer or externally and usually requires more voltage for erasure than the common 5 volts used in logic circuits It functions like non volatile RAM but writing to EEPROM is slower than writing to RAM...

Page 76: ...ower switch before connecting or disconnecting connectors or parts may be damaged Connect the drain pump Replace the indoor unit PCB control PCB Replace the drain pump There is a drain system abnormal...

Page 77: ...etection The rotation speed detected by the Hall IC during fan motor operation determines abnormal fan motor operation Error Decision Conditions The fan motor is not revved up Supposed Causes Layer sh...

Page 78: ...onnector YES YES NO NO Note The motor may break when the motor connector is disconnected while the power is turned on Be sure to turn off the power before reconnecting the connector Replace the indoor...

Page 79: ...ectric expansion value in humidifier s Defective indoor unit PCB Troubleshooting Note The system continues to operate with the thermostat OFF even while the error code is displayed YES YES NO NO Cauti...

Page 80: ...follows C4 Indoor heat exchanger thermistor 1 liquid pipe R2T C5 Indoor heat exchanger thermistor 2 R3T C9 Room temperature thermistor R1T Note When replacing the defective thermistor s replace the th...

Page 81: ...use of the problem is related to the sensors the sensors should be checked prior to changing the indoor unit PCB Note When replacing the defective sensor s replace the sensor kit as ASSY R24577 YES NO...

Page 82: ...unning Supposed Causes Defective room temperature thermistor in the wired remote controller Defective wired remote controller PCB External factor such as noise Troubleshooting Note To delete the recor...

Page 83: ...Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Are both remote controllers set to MAIN Do the service monitors of all the indoor uni...

Page 84: ...en using 2 remote controllers Defective remote controller PCB Troubleshooting Note For the way to change MAIN SUB setting of remote controllers refer to pages 122 and 123 Turn the power off and then b...

Page 85: ...the model The compressor stops if the error occurs and restarts automatically after 3 minute standby Over voltage detection An over voltage signal is fed from the over voltage detection circuit to th...

Page 86: ...S YES YES Reconnect the harness Check the power supply voltage Check the connection of the compressor harness Disturbance factors Noise Power supply distortion Precaution before turning on the power a...

Page 87: ...Error Decision Conditions The data sent from the outdoor unit cannot be received normally or the content of the data is abnormal Supposed Causes Power supply voltage out of specification Reduction of...

Page 88: ...d the outdoor unit Replace the outdoor unit PCB main PCB Replace the connection wires between the indoor unit and outdoor unit Is LED A blinking Properly insulated Is there any disturbance Is there an...

Page 89: ...eck again YES YES NO NO Connect the indoor outdoor units correctly YES YES YES YES NO NO NO Blink R24372 Is the combination of indoor outdoor units correct Do the service monitors of all the indoor un...

Page 90: ...tary drop of voltage Momentary power failure Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Continuously ON or OFF B...

Page 91: ...wn Reset condition Continuous run for about 60 minutes without any other error Supposed Causes Disconnection of discharge pipe thermistor Defective discharge pipe thermistor Disconnection of connector...

Page 92: ...the electronic expansion valve or the coil Refer to the refrigerant line check procedure Replace the outdoor unit PCB main PCB Replace the four way valve or the coil Replace the outdoor unit PCB main...

Page 93: ...the harnesses U V and W R21067 Caution NO YES YES NO NO YES NO YES Check No 15 Check with the inverter analyzer Turn off the power and reconnect the harnesses Turn on the power again and restart the s...

Page 94: ...fan motor Foreign matter stuck in the fan Defective fan motor Defective outdoor unit PCB Troubleshooting Check No 16 Refer to P 106 R20416 Caution YES YES NO YES NO NO YES NO Turn on the power Rotate...

Page 95: ...Refer to P 107 Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged An input overcurrent may result from wrong internal wiring If the syst...

Page 96: ...ondition continues over 10 minutes after operating for 5 minutes Cooling Dry A B 5 C A B 9 F Heating B A 5 C B A 9 F A Room thermistor temperature B Indoor heat exchanger temperature If the error repe...

Page 97: ...dust clogged Reconnect the thermistor s Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged R20405 Refrigerant shortage Water mixed Stop...

Page 98: ...hermistor Defective electronic expansion valve or coil Refrigerant shortage Defective four way valve Water mixed in refrigerant Defective stop valve Defective outdoor unit PCB Troubleshooting Check No...

Page 99: ...he outdoor heat exchanger thermistor exceeds the limit Error Decision Conditions The temperature sensed by the outdoor heat exchanger thermistor rise above 57 5 61 C 135 5 141 8 F depending on the mod...

Page 100: ...or unit PCB main PCB Replace the electronic expansion valve or the coil Replace the outdoor unit PCB main PCB Change the installation location or direction Clean the outdoor heat exchanger Check the i...

Page 101: ...Abnormal operation due to air intrusion Defective discharge pipe thermistor Troubleshooting Check No 01 Refer to P 100 YES R23655 NO OK NG Caution Replace the outdoor unit Replace both the discharge p...

Page 102: ...e before compressor start up is below 50 V Supposed Causes Broken or disconnected harness Defective outdoor unit PCB Troubleshooting Caution Be sure to turn off the power switch before connecting or d...

Page 103: ...h the position detection circuit Error Decision Conditions If the error repeats the system is shut down Reset condition Continuous run for about 11 minutes without any other error Supposed Causes Powe...

Page 104: ...Check with the inverter analyzer Turn off the power Disconnect the harnesses U V and W Turn on the power Check the electrolytic capacitor voltage Electrical components or compressor harnesses connect...

Page 105: ...04 V or less with the power on J3 error is judged if the discharge pipe temperature is lower than the heat exchanger temperature Supposed Causes Disconnection of the connector for the thermistor Defec...

Page 106: ...mperature Replace the defective thermistor s of the following thermistors Outdoor temperature thermistor Discharge pipe thermistor Outdoor heat exchanger thermistor Cooling Outdoor heat exchanger temp...

Page 107: ...Troubleshooting Check No 17 Refer to P 107 Check No 19 Refer to P 108 A B C C F C F C F 09 12 class 82 179 6 65 149 70 158 15 18 class 90 194 64 147 2 81 177 8 Caution WARNING To cool the electrical c...

Page 108: ...the outdoor unit PCB Troubleshooting Check No 17 Refer to P 107 Check No 19 Refer to P 108 Note Refer to Silicone Grease on Power Transistor Diode Bridge on page 126 for details A B C F C F 09 12 cla...

Page 109: ...rotation speed error occurs while the compressor is running An output overcurrent signal is fed from the output overcurrent detection circuit to the microcomputer If the error repeats the system is sh...

Page 110: ...the same error occurs Check the power supply voltage Monitor the power supply voltage discharge and suction pressures and other factors for a long term Possible causes Momentary drop of power supply...

Page 111: ...e control PCB to measure the resistance When the connector of indoor heat exchanger thermistor is soldered on a PCB remove the thermistor and measure the resistance Thermistor temperature Resistance k...

Page 112: ...er Supply Waveforms Check Check No 11 Measure the power supply waveform between No 1 and No 2 on the terminal block and check the waveform disturbance Check if the power supply waveform is a sine wave...

Page 113: ...not generate a latching sound in step 2 disconnect the connector and check the continuity using a multimeter 4 Check the continuity between the pins 5 1 5 2 5 3 5 4 between the pins 6 1 6 2 6 3 and 6...

Page 114: ...ng Dry Defrost Not energized Heating energized Replace the outdoor unit PCB main PCB Replace the four way valve coil Replace the four way valve Four way valve coil resistance at 1000 2000 S80 voltage...

Page 115: ...re to turn off the power Step 2 Install an inverter analyzer instead of a compressor Note Make sure the charged voltage of the built in smoothing electrolytic capacitor drops to 10 VDC or below before...

Page 116: ...urn the power on 2 Set FAN operation using the remote controller 3 Press and hold Cancel button for 4 seconds or longer Test operation will stop automatically after about 30 minutes To stop the operat...

Page 117: ...hat the control voltage between the pins 4 3 is 15 VDC 4 Check that the rotation command voltage between the pins 4 2 is 0 6 5 VDC 5 Keep operation off and power off Connect the connector S70 or S71 6...

Page 118: ...dirty Change the installation location or direction Change the installation location or direction Clean the outdoor heat exchanger Change the installation location or direction Check the outdoor temp...

Page 119: ...ring to the table below If the resistance is or less than 1 k short circuit occurs on the main circuit 09 12 class R21195 YES NO NO YES Outdoor fan system is functioning Check the outdoor fan system R...

Page 120: ...Check SiUS091628EA 109 Service Diagnosis 15 18 class R20701 1 2 3 4 Multimeter...

Page 121: ...on on the connector Follow the procedure below to measure resistance between the terminals of the power module and the terminals of the compressor with a multimeter Evaluate the measurement results re...

Page 122: ...Check SiUS091628EA 111 Service Diagnosis 15 18 class R20704 W V U DC_P1 DC_N1...

Page 123: ...peration 115 4 Field Settings 118 4 1 How to Change the Field Settings 118 4 2 Overview of the Field Settings 121 4 3 MAIN SUB Setting when Using 2 Wired Remote Controllers 122 4 4 Address and MAIN SU...

Page 124: ...ails 1 Remove the valve caps from the liquid stop valve and the gas stop valve 2 Carry out forced cooling operation 3 After 5 to 10 minutes close the liquid stop valve with a hexagonal wrench 4 After...

Page 125: ...settings menu is displayed 3 Select in the service settings menu and press Menu OK button Basic screen returns and Test Operation is displayed at the bottom 4 Press On Off button within 10 seconds an...

Page 126: ...and parts such as the movement of the flaps are working properly To protect the air conditioner restart operation is disabled for 3 minutes after the system has been turned off 4 After trial operatio...

Page 127: ...cording to the setting For operation of airflow direction setting see the operation manual 7 After the operation of airflow direction is confirmed press Menu OK button Basic screen returns 8 Press and...

Page 128: ...plete cooling heating function Refrigerant gas and liquid pipes and indoor drain hose extension are thermally insulated Water leakage Draining line is properly installed Water leakage Does the power s...

Page 129: ...ote controller Wired Remote Controller BRC1E73 a Unit No b First code No c Second code No d Mode 1 Press and hold Cancel button for 4 seconds or longer Service settings menu is displayed 2 Select in t...

Page 130: ...d When SECOND CODE NO is displayed as there is no function 6 Press Menu OK button Setting confirmation screen is displayed 7 Select and press Menu OK button Setting details are determined and field se...

Page 131: ...r at least 4 seconds to enter the Field Set mode 2 Select the desired Mode No with MODE button 3 Press button and select the First code No 4 Press button and select the Second code No 5 Press RESERVE...

Page 132: ...nabled Disabled 3 Filter cleaning sign Display No display 12 22 0 Optional accessories output selection field selection of output for adaptor for wiring Compressor Operation output Error output Outdoo...

Page 133: ...hen the above message is displayed Hold Mode button for 4 seconds or longer to set When the display is changed from Main RC to Sub RC the setting is completed 2 Basic screen is displayed Sub remote co...

Page 134: ...indoor unit change the MAIN SUB switch of the transmitter board Transmitter Board Wireless address switch Set the wireless address setting switch SS2 on the transmitter board according to the table b...

Page 135: ...emote controller etc the indoor unit sometimes does not respond to ON OFF command or temperature setting command from the wireless remote controller Check what setting the customer needs and make the...

Page 136: ...top operating if the outdoor temperature falls below 20 C 4 F restarting once the temperature rises above this level 1 Remove the top plate of the outdoor unit 09 12 class 3 screws 15 18 class 6 screw...

Page 137: ...bridge Details 1 Wipe off the old silicone grease completely 2 Apply the silicone grease evenly See the illustrations below for examples of application 3 Tighten the screws of the power transistor dio...

Page 138: ...SiUS091628EA 127 Appendix Part 8 Appendix 1 Piping Diagrams 128 1 1 Indoor Unit 128 1 2 Outdoor Unit 129 2 Wiring Diagrams 130 2 1 Indoor Unit 130 2 2 Outdoor Unit 131 3 Operation Limit 133...

Page 139: ...ing Diagrams 1 1 Indoor Unit FFQ09 12 15 18Q2VJU REFRIGERANT FLOW M MODEL FFQ09Q2VJU 1 4 6 4 3 8 9 5 1 2 12 7 FFQ12Q2VJU FFQ15Q2VJU FFQ18Q2VJU A B FAN HEAT EXCHANGER COOLING HEATING LIQUID PIPE CONNEC...

Page 140: ...FIELD PIPING 3 8 CuT GAS STOP VALVE WITH SERVICE PORT DISCHARGE PIPE THERMISTOR FOUR WAY VALVE ON HEATING 3D092207A OUTDOOR UNIT HEAT EXCHANGER 9 32 CuT 9 32 CuT 9 32 CuT 1 2 CuT 9 32 CuT CAPILLARY TU...

Page 141: ...ITOR M1F MAGNETIC RELAY FAN MOTOR DRAIN PUMP MOTOR SWING MOTOR SWITCHING POWER SUPPLY FLOAT SWITCH NOISE FILTER FERRITE CORE FERRITE CORE DIODE BRIDGE RECEIVER TRANSMITTER TERMINAL BLOCK TERMINAL BLOC...

Page 142: ...OTE YLW Y1S V t t t U M W MS Q1L Y1E M1F M1C Z1C N 2 FU3 20A Z2C N 2 FU2 3 15A FU1 3 15A Z3C N 2 MS 3 IN CASE OF HEAT PUMP TYPE R1T OUTDOOR R2T CONDENSER R3T DISCHARGE 1 REFER TO THE NAMEPLATE FOR THE...

Page 143: ...HE NAMEPLATE FOR THE POWER REQUIREMENTS V U W t t t MS M Y1S Q1L Y1E M1C M1F GROUND N 5 Z3C N 4 Z2C FU3 30A FU1 3 15A FU2 3 15A Z1C N 4 MS 3 R1T OUTDOOR R2T CONDENSER R3T DISCHARGE IN CASE OF HEAT PUM...

Page 144: ...puters Never use it in a residence or office the space where there is a human Indoor fan tap should be fixed to high Cutting jumper 6 J6 on the circuit board extend the operation range to 14 F 10 C In...

Page 145: ...Revision History Month Year Version Revised contents 12 2016 SiUS091628E First edition 03 2017 SiUS091628EA Model addition FFQ18Q2VJU RX18QMVJU...

Page 146: ...horized parts and accessories or improper installation of parts and accessories can result in water or refrigerant leakage electrical shock fire or explosion z Read the user s manual carefully before...

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